False sharing test in C#.

FalseSharing.cs

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;

namespace ConsoleApplication2
{
	class Program
	{
		struct Fuck
		{
			public int x, y;
		}

		[StructLayout(LayoutKind.Explicit)]
		struct Suck
		{
			[FieldOffset(0)]
			public int x;

			[FieldOffset(512)]
			public int y;
		}

		private static Fuck fuck;
		private static Suck suck;
		
		static void Main(string[] args)
		{
			var t1 = new Thread(Thread1);
			var t2 = new Thread(Thread2);

			var t3 = new Thread(Thread3);
			var t4 = new Thread(Thread4);

			var timer = new Stopwatch();
			timer.Start();
			t1.Start();
			t2.Start();
			t1.Join();
			t2.Join();
			timer.Stop();
			Console.WriteLine("False sharing: {0} ms", timer.ElapsedMilliseconds); // 617 ms

			timer = new Stopwatch();
			timer.Start();
			t3.Start();
			t4.Start();
			t3.Join();
			t4.Join();
			timer.Stop();
			Console.WriteLine("No false sharing: {0} ms", timer.ElapsedMilliseconds); // 393 ms
		}

		private static void Thread1()
		{
			for (int i = 0; i < 100000000; ++i)
			{
				++fuck.x;
			}
		}

		private static void Thread2()
		{
			for (int i = 0; i < 100000000; ++i)
			{
				++fuck.y;
			}
		}

		private static void Thread3()
		{
			for (int i = 0; i < 100000000; ++i)
			{
				++suck.x;
			}
		}

		private static void Thread4()
		{
			for (int i = 0; i < 100000000; ++i)
			{
				++suck.y;
			}
		}
	}
}